Privacy
Guests
- Your browser keeps a random ID, not linked to your name, so the game knows which boards you have played.
- The server keeps each board you finish, your time, your wrong guesses and your speed rating under that ID and deletes them after 7 days, unless you sign in.
- Your theme and language stay in your browser.
Signed in
- Google gives us your email, name and profile picture address. We never see your password.
- We keep your username, results and rating.
- Your username and times are public. Your email and Google name are never shown.
- Your login is shared with other CharlX Studio apps. It holds your email and Google name.
Ads
- Google AdSense ads pay for Boxsum. Google and its partners use cookies to show and measure ads, and may base them on your visits to this and other sites.
- In the EEA, the UK and Switzerland, you are asked first before personalised ads.
- How Google uses this data · Turn off personalised ads
- We never sell or share your data for marketing.
Who handles it
Supabase (database and sign-in, in Tokyo), Cloudflare (the website) and Google (sign-in, fonts, ads). They keep short technical logs that include your IP address.
Deleting your data
- Account → Delete my data removes your results, rating and username.
- That does not remove the shared login. To remove it too, email us from the address you signed in with.
- Guests: clear this site's data in your browser. The server copy goes within 7 days.
Children
Under 14? Play as a guest, and don't sign in.